“No! no! There is no fire!” cried the master of the Hall, hastily. “I believe it is nothing but some boys cutting-up. Listen!”

The sound in Mumps’s dormitory had ceased, but now came another sound from downstairs—the overturning of a chair, followed by the crash of glassware.

“That is in the dining-room, or the store-room!” shrieked Mrs. Green. “Oh, they must be burglars, sir! The boys would not make such a dreadful noise.”

“I’ll soon get at the bottom of this,” said Captain Putnam, sternly, and ran down the back stairs as rapidly as his dressing gown would permit. In the meantime many boys came out into the corridors, and George Strong, the assistant teacher, appeared.

When Captain Putnam reached the store-room he found the door locked. But the key was in the lock, and he speedily turned it and let himself in. It was almost totally dark in the room, and he had not taken two steps before he felt some broken glass under his feet. The window was open and he darted to it, to behold two students on the campus outside.

“Stop!” he called out. But instead of obeying the command the students kept on running, and disappeared from sight around an angle of the building.

“I will get at the bottom of this—I must get at the bottom of it,” the master of the Hall told himself, and lost no time in lighting up. A glance around showed him that a small stand containing some water-glasses had been tipped over and several glasses were broken.

“That stand was in the way in the dining-room, so we had it removed to here,” explained Mrs. Green. “Oh, what a mess! Be careful, sir, or you’ll cut your feet.”

“Mr. Strong, two students just leaped from this window and are outside,” said the captain, as his assistant appeared at the store-room door. “Find out who they are and bring them to my office.”

“Yes, sir,” answered George Strong, and ran for a door opening onto the campus. Once outside he saw Coulter and Ritter in the act of sneaking off towards the barns and ran after them.